Cation transport in Escherichia coli. VI. K exchange.
K influx and net K flux have been measured in suspensions of chloramphenicol-arrested Escherichia coli. The rate of K exchange in the steady state was independent of the K concentration of the medium over a 200-fold range. Under a number of experimental conditions the rate of exchange may be considerably increased or decreased without changing the cellular K content. These results show that under these conditions changes in K influx are associated with equal changes in K efflux, and suggest that the latter process is, at least in part, both carrier-mediated and tightly coupled to the influx process.
D001692:Biological Transport; D002701:Chloramphenicol / Q000494:pharmacology; D004926:Escherichia coli / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D066298:In Vitro Techniques; D007700:Kinetics; D011188:Potassium / Q000378:metabolism*; D011194:Potassium Isotopes / Q000378:metabolism
D011194:Potassium Isotopes; D002701:Chloramphenicol; D011188:Potassium